Computer-Aided Design Drafters and Technicians

Technicians specializing in computer-aided design technology usually work in the design and drafting activities associated with architecture, urban planning, interior design, electronic design, and manufacturing design. CAD technicians must combine drafting and computer skills. Most CAD technicians specialize in a particular industry or on one part of a design.

CAD technicians work under the direction and supervision of CAD engineers and designers, experts highly trained in applying computer technology to industrial design and manufacturing. These designers and engineers plan how to relate the CAD technology and equipment to the design process. They are also the ones who give assignments to the CAD technicians.

Technicians work at specially designed and equipped interactive computer graphics workstations. They call up computer files that contain data about a new product; they then run the programs to convert that information into diagrams and drawings of the product. These are displayed on a video display screen, which then acts as an electronic drawing board. Following the directions of a CAD engineer or designer, the CAD technician enters changes to the product's design into the computer. The technician merges these changes into the data file, then displays the corrected diagrams and drawings.

The software in CAD systems is very helpful to the user—it offers suggestions and advice and even points out errors. The most important advantage of working with a CAD system is that it saves the technician from the lengthy process of having to produce, by hand, the original and then the revised product drawings and diagrams.

The CAD workstation is equipped to allow technicians to perform calculations, develop simulations, and manipulate and modify the displayed material. Using typed commands at a keyboard, a stylus or light pen for touching the screen display, a mouse, joystick, or other electronic methods of interacting with the display, technicians can move, rotate, or zoom in on any aspect of the drawing on the screen, and project three-dimensional images from two-dimensional sketches. They can make experimental changes to the design and then run tests on the modified design to determine its qualities, such as weight, strength, flexibility, and the cost of materials that would be required. Compared to traditional drafting and design techniques, CAD offers virtually unlimited freedom to explore alternatives, and in far less time.

When the product design is completed and the necessary information is assembled in the computer files, technicians may store the newly developed data, print it, copy it to another computer, or send it directly to another step of the automated testing or manufacturing process.

Once the design is approved for production, CAD technicians may use their computers to assist in making detailed drawings of certain parts of the design. They may also prepare designs and drawings of the tools or equipment, such as molds, cutting tools, and jigs, that must be specially made in order to manufacture the product. As the product moves toward production, technicians, drafters, and designers may work closely with those assembling the product to ensure the same quality found with prototype testing.

CAD technicians must keep records of all of their test procedures and results. They may need to present written reports, tables, or charts to document their test results or other findings. If a particular system, subsystem, or material has not met a testing or production requirement, technicians may be asked to suggest a way to rearrange the system's components or substitute alternate materials.

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